fix(sqlite): bound subset query parameters by host limit by KyleAMathews · Pull Request #2000 · TanStack/db

KyleAMathews · 2026-10-02T15:40:49Z

🎯 Changes

A loadSubset request with two 1,000-value IN lists could bind about 2,000 parameters in one SQLite statement. The former 900-value chunking split each list into clauses, but all clauses kept their parameters in that statement. SQLite rejected the request on a connection limited to 999 variables.

This PR bounds each subset read by the SQLite driver's parameter limit and preserves the matching persisted rows. Runtime IN predicates now bind each list as one JSON array:

field IN (SELECT value FROM json_each(?))

The compiler preserves typed comparisons, including signed 64-bit bigint values beyond JavaScript's safe-integer range. An empty list still matches no rows. Index expressions and partial-index predicates still use SQL literals because SQLite does not permit these subqueries in index definitions.

After the compiler combines the predicates and ordering, the adapter checks the complete SELECT parameter count. If it exceeds the driver's limit, the adapter reads the table without parameters. Its existing in-memory evaluator then applies the predicate, ordering, and pagination. This guard also covers many scalar predicates and both cursor SELECTs. The default limit is 999 when a driver does not declare one. The Cloudflare transaction driver now retains its root driver's 100-parameter limit.

The change removes 22 net production lines across the SQLite core and Cloudflare driver. It requires no data migration.

Verification and limits

The core binding-capacity oracle passed all seven focused checks after the final merge. It uses a prepared Node SQLite connection limited to 999 variables. The 998/999/1,000 single-list cases and 499+500/500+500 composed cases check the boundary. Other cases cover empty lists, typed values, signed 64-bit bigint, both cursor SELECTs, and both index-definition contexts.
The Cloudflare host-limit file passed all seven runtime cases. Controlled storage checks 100 and 101 OR-composed equality or one-item IN clauses through savepoint and native transaction modes.
The original 900-value chunking failed at the predicate SELECT under the core oracle. Fixed-seed replay 1993999/1:0 failed before the change and passed after it. The Cloudflare 101-clause cases failed before the transaction driver retained the 100-parameter cap and passed after it.
The SQLite CLI contract passed 40/40, and the lifecycle file passed 4/4. Both changed packages built, and changed files passed ESLint and the diff check.
A full core package run with two test threads passed 684 tests and had three long-test timeouts. The affected CLI and lifecycle files passed in isolation.

The oracle checks these bounded histories on Node SQLite and a controlled Cloudflare storage seam. It does not execute in Cloudflare Workers, browser, mobile, Tauri, or native device hosts. It also does not establish JSON-function availability in those hosts, 50,582-ID stress, full-table fallback cost, or value equivalence for null, nonfinite, container, and structured values. The coverage map records these remaining witnesses.

✅ Checklist

I ran pnpm test locally. Focused tests passed. The full core run had three timeouts.

🚀 Release Impact

This change affects published code, and a changeset documents it.
This change is docs/CI/dev-only (no release).

Fixes #1993

Summary by CodeRabbit

Bug Fixes
- Fixed subset queries with large IN filters so they return matching rows without exceeding SQLite’s binding limits.
- Improved reliability across SQLite persistence and Cloudflare Durable Object transactions, including savepoint and native transaction modes.
Documentation
- Added contributor guidance and coverage notes for SQLite binding limits and tested query scenarios.

…te-in-bindings

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📒 Files selected for processing (9)

.changeset/fix-sqlite-in-binding-limits.md
docs/contributing/oracle-coverage.md
docs/contributing/oracle-reviews/issue-1993-sqlite-binding-capacity.md
packages/cloudflare-durable-objects-db-sqlite-persistence/src/do-driver.ts
packages/cloudflare-durable-objects-db-sqlite-persistence/tests/do-replacement-batching.test.ts
packages/db-sqlite-persistence-core/src/sqlite-core-adapter.ts
packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-cli-runtime.test.ts
packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-oracle.test.ts
packages/node-db-sqlite-persistence/tests/expression-index-oracle.test.ts

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docs/contributing/oracle-coverage.md
docs/contributing/oracle-reviews/issue-1993-sqlite-binding-capacity.md
packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-oracle.test.ts

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📝 Walkthrough

Walkthrough

SQLite subset queries now bind runtime IN lists as JSON values and fall back to in-memory filtering when a statement exceeds its binding limit. The changes also propagate binding limits through Cloudflare transaction drivers and add capacity-focused tests and documentation.

Changes

SQLite binding capacity

Layer / File(s)	Summary
Core binding-capacity handling `.changeset/fix-sqlite-in-binding-limits.md`, `packages/db-sqlite-persistence-core/src/sqlite-core-adapter.ts`	Runtime `IN` lists use a JSON array parameter with `json_each(?)`. When a compiled subset query exceeds the effective binding limit, the adapter removes SQL filtering and ordering and processes loaded rows in memory. The core driver wrapper forwards the underlying parameter limit.
Core capacity oracle `packages/db-sqlite-persistence-core/tests/*`, `packages/node-db-sqlite-persistence/tests/expression-index-oracle.test.ts`, `docs/contributing/oracle-coverage.md`, `docs/contributing/oracle-reviews/issue-1993-sqlite-binding-capacity.md`	The oracle adds capped SQLite prepared-statement checks, fixed and generated predicate cases, cursor and index checks, and replay support. Node SQLite expression-index tests now validate JSON-array bindings. The CLI test runs the oracle, and the documentation records coverage and results.
Cloudflare transaction capacity `packages/cloudflare-durable-objects-db-sqlite-persistence/src/do-driver.ts`, `packages/cloudflare-durable-objects-db-sqlite-persistence/tests/do-replacement-batching.test.ts`, `docs/contributing/oracle-coverage.md`	The transaction driver forwards the parent driver’s binding limit. Tests enforce a 100-parameter host cap and check `loadSubset` results in savepoint and native transaction modes for 100- and 101-clause cases.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to b0d78

The change keeps SQLite subset queries within the driver's parameter limit by binding IN lists as JSON and falling back to in-memory filtering. No concrete merge-blocking risk remains in the reviewed evidence.

Security Architecture Review

Security architecture risk: 🔵 Low · up to b0d78

The change retains collection-scoped reads and result filtering. Whole-collection fallback can increase resource use, and behavior across all supported hosts is not yet established. No introduced authorization bypass was identified in the inspected paths.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

inferred — A caller able to construct an over-cap predicate can cause all rows of the selected collection to be materialized before filtering and pagination, increasing work for that request and potentially delaying operations sharing its driver. This does not establish new maximum data authority: the base already permitted whole-collection reads through the same interface. No remote attacker or cross-tenant reachability was established.

Trust Boundaries and Controls

observed — The fallback removes SQL row filtering but retains selection of the registered collection table and applies the original predicate before returning rows. Collection registration and schema checks are not authentication or tenant authorization controls; upstream enforcement was not inspected.

Resilience and Maintainability Implications

observed — The complete statement count, including ordering parameters, is checked before submission. This contains the binding-capacity failure without dropping returned-row filtering. The oracle uses fresh databases, rollback-capable test transactions, and finally-based cleanup, but does not establish interruption recovery or concurrent-writer behavior on production hosts.

Hardening Proposals

proposed — Before treating capacity handling as established across hosts, add receiving-runtime checks for JSON expansion and actual binding limits. Where untrusted callers can influence predicates, measure fallback row-read and memory costs and consider workload limits appropriate to that exposure.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 52 functions across 7 files. (2 skipped: 2…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: limiting SQLite subset-query parameters to the host limit.
Description check	✅ Passed	The description covers the changes, verification, release impact, and known limitations. It includes the required template sections and confirms a changeset, but the test checklist remains unchecked d…
Linked Issues check	✅ Passed	Issue `#1993` requires SQLite subset statements to stay within the driver’s total parameter limit, including composed predicates. The core compiler binds each runtime `IN` list as one JSON parameter, an…
Out of Scope Changes check	✅ Passed	The current whole-PR changeset diff contains only the SQLite binding-limit release entry. The core and Cloudflare driver changes, tests, and oracle documentation all support issue `#1993`. The unrelated…

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 52 functions across 7 files. (2 skipped: 2 unsupported.)

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pkg-pr-new · 2026-10-02T15:44:44Z

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commit: cf201a6

github-actions · 2026-10-02T15:45:46Z

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github-actions · 2026-10-02T15:46:49Z

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Inline comments:
Review comments at
@packages/db-sqlite-persistence-core/src/sqlite-core-adapter.ts:
- Around line 2412-2416: Update the parameter-limit check to fall back from the
transaction driver’s maxBoundParameters to the validated root-driver limit
before using 999; retain that root limit on the adapter during initialization so
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.changeset/fix-sqlite-in-binding-limits.md
docs/contributing/oracle-coverage.md
docs/contributing/oracle-reviews/issue-1993-sqlite-binding-capacity.md
packages/cloudflare-durable-objects-db-sqlite-persistence/src/do-driver.ts
packages/cloudflare-durable-objects-db-sqlite-persistence/tests/do-replacement-batching.test.ts
packages/db-sqlite-persistence-core/src/sqlite-core-adapter.ts
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…te-in-bindings # Conflicts: # packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-cli-runtime.test.ts

changeset-bot · 2026-10-05T15:57:59Z

🦋 Changeset detected

Latest commit: cf201a6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 12 packages

Name	Type
@tanstack/db-sqlite-persistence-core	Patch
@tanstack/cloudflare-durable-objects-db-sqlite-persistence	Patch
@tanstack/browser-db-sqlite-persistence	Patch
@tanstack/capacitor-db-sqlite-persistence	Patch
@tanstack/electron-db-sqlite-persistence	Patch
@tanstack/expo-db-sqlite-persistence	Patch
@tanstack/node-db-sqlite-persistence	Patch
@tanstack/react-native-db-sqlite-persistence	Patch
@tanstack/tauri-db-sqlite-persistence	Patch
@tanstack/capacitor-db-sqlite-persistence-e2e-app	Patch
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Inline comments:
Review comments at @docs/contributing/oracle-coverage.md:
- Around line 303-304: Update the documented SQLite binding-capacity oracle path
in the `sqlite-core-adapter.test.ts` reference to point to
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Review comments at
@packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-oracle.test.ts:
- Around line 2959-2968: Update limitedDatabase to verify that the created
DatabaseSync instance has limits.variableNumber equal to cap before returning
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docs/contributing/oracle-coverage.md
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packages/db-sqlite-persistence-core/src/sqlite-core-adapter.ts
packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-cli-runtime.test.ts
packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-oracle.test.ts

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_{compressed-size-action::db-and-react-package-size}

Isaac added 7 commits October 2, 2026 09:18

fix(sqlite): keep subset queries within binding limits

dd4dc31

Merge remote-tracking branch 'origin/main' into codex/issue-1993-sqli…

cbd9d24

…te-in-bindings

fix(cloudflare): retain binding cap in transaction driver

51c060a

docs: audit SQLite binding oracle coverage

43ca662

docs: correct SQLite oracle review receipts

15c6e98

Merge remote-tracking branch 'origin/main' into codex/issue-1993-sqli…

e9a4948

…te-in-bindings

chore: document SQLite binding cap fix

a2a77d8

coderabbitai Bot reviewed Oct 2, 2026

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Comment thread packages/db-sqlite-persistence-core/src/sqlite-core-adapter.ts Outdated

Isaac added 3 commits October 2, 2026 10:00

test(sqlite): preserve expression-index oracle with JSON IN bindings

398725d

fix(sqlite): retain root binding cap in transaction reads

14c0e4e

docs(sqlite): record CI oracle and transaction cap evidence

444dbb9

TimFL mentioned this pull request Oct 3, 2026

fix(sqlite): compile boolean predicates with safe prefiltering #1997

Merged

2 of 3 tasks

Merge remote-tracking branch 'origin/main' into codex/issue-1993-sqli…

2faed0b

…te-in-bindings # Conflicts: # packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-cli-runtime.test.ts

coderabbitai Bot reviewed Oct 5, 2026

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Comment thread docs/contributing/oracle-coverage.md Outdated

Comment thread packages/db-sqlite-persistence-core/tests/sqlite-core-adapter-oracle.test.ts

test(sqlite): verify oracle host binding limit

20a1d77

Isaac and others added 5 commits October 5, 2026 10:32

test(sqlite): enforce binding cap on older Node hosts

f9161a6

docs(sqlite): record Node host oracle boundary

ad752e8

ci: apply automated fixes

b0d7882

Merge main into SQLite binding-limit PR

96bdd53

Merge remote SQLite oracle formatting follow-up

cf201a6

KyleAMathews merged commit b6c8540 into main Oct 5, 2026
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KyleAMathews deleted the codex/issue-1993-sqlite-in-bindings branch October 5, 2026 17:12

github-actions Bot mentioned this pull request Oct 5, 2026

ci: Version Packages #2041

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fix(sqlite): bound subset query parameters by host limit - #2000

fix(sqlite): bound subset query parameters by host limit#2000
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